Backdoor:W32/SdBot.CNG

Classification

Malware

Backdoor

W32

Virus.Win32.Virut, Backdoor.Generic.178032, Worm:Win32/Neeris.AN (Microsoft) , W32/Virut.gen.A (McAfee)

Summary

A remote administration tool (RAT) that bypasses the security features of a program, computer or network to give unauthorized access or control to its user.

Removal

Automatic action

Based on the settings of your F-Secure security product, it will either move the file to the quarantine where it cannot spread or cause harm, or remove it.

Find out more

Knowledge Base

Find the latest advice in our Community Knowledge Base.

User Guide

See the user guide for your product on the Help Center.

Contact Support

Chat with or call an expert for help.

Submit a sample

Submit a file or URL for further analysis.

Technical Details

Backdoor:W32/SdBot.CNG is a backdoor program that can be controlled by an attacker through an Internet Relay Chat (IRC) channel. The program itself is usually sized around 28 to 55 kB.

Distribution

SdBot.CNG is propagated through multiple vectors:

  • Removable media such as USB thumb drives
  • Instant Messaging (IM) networks (e.g., AIM, MSN, ICQ and Triton)
  • Network shares
  • Peer-to-Peer (P2P) networks (e.g., Edonkey2000, Morpheus, KAZAA, LimeWire, BearShare and Grokster) via the application's shared folders

Installation

During installation, SdBot.CNG creates a copy of itself in one of these folders:

  • %windir%system\VMwareservice.exe
  • %windir%system32\csrsc.exe

Activity

While active, the backdoor has the following functionalities:

  • Perform SYN Floods
  • Perform Distributed Denial of Service (DDoS) attacks
  • View MSN, AIM and Triton threads
  • Propagate via AIM, MSN and Triton
  • Download files
  • Update itself
  • Steal passwords from Protected Storage
  • View and create processes
  • Visit user defined websites
  • Perform shell executions

SdBot.CNG is also able to detect applications or services such as VMware, Nepenthes, sandboxes and honeypots.

Registry

The backdoor program creates on of the following Registry keys in order to automatically execute the copy of itself saved in the Windows directory:

  • HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\VMwareService = "VMwareService.exe"
  • HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\VMwareService = "VMwareService.exe"
  • HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WinSpoolSvc = "csrsc.exe"
  • HKEY_LOCAL_MACHINE\SYSTEM\CurrentSet001\Services\WinSpoolSvc = "csrsc.exe"

It also creates the following Autorun.inf to facilitate its propagation on removal media such as USB thumb drives:

  • [autorun] open = RECYCLER\S-1-6-21-2434476501-1644491937-600003330-1213\autorunme.exe icon=%SystemRoot%\system32\SHELL32.dll,4 action=Open folder to view files
  • [autorun] open = RECYCLER\S-1-6-21-2434476501-1644491937-600003330-1213\autorunme.exe icon=%SystemRoot%\system32\SHELL32.dll,4 action=Open folder to view files shell\open=Open shell\open\command=RECYCLER\S-1-6-21-2434476501-1644491937-600003330-1213\autorunme.exe shell\open\default=1

Date Created: -

Date Last Modified: -